<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="../lib/jquery.min.js"></script>
</head>

<body>
    <input type="file" id="file1">
    <button id="btnUpload">上传文件</button>
    <br>
    <img src="../Resource/carton.jpg" alt="" style="display: none;" id="loading">

    <script>
        $(function () {
            $(document).ajaxStart(function () {
                $("#loading").show();
            })

            $(document).ajaxSend(function () {
                $("#loading").hide();
            })

            $("#btnUpload").on("click", function () {
                let files = $("#file1")[0].files;
                if (files.length <= 0) {
                    return alert("选择文件");
                }

                let fd = new FormData();
                fd.append("avatar", files[0]);

                $.ajax({
                    method: "POST",
                    url: "http://www.liulongbin.top:3006/api/upload/avatar",
                    data: fd,
                    contentType: false,
                    processData: false,
                    success: function (res) {
                        console.log(res);
                    }
                })
            })
        })
    </script>
</body>

</html>